Best Second Hand Electric Motors for DIY Projects
Discover a curated set of second hand and refurbished electric motors suited for DIY, science kits, and hobby projects. This guide highlights versatile options across voltages and speeds, with practical notes on usage and compatibility. Each entry includes a quick look at core specifications to help you compare performance and find the right fit for your project.
| Product | Brand | Voltage / Speed | Key Feature | Ideal For |
|---|---|---|---|---|
| VEVOR 2HP Air Compressor Motor | VEVOR | 115/230V, 3450 RPM | 56 frame, single phase, CCW/CW | Industrial fans and compressors |
| EUDAX 18 Set DC Motors Kit | EUDAX | DC 3V-12V, up to 24000 RPM | Large kit with AA battery holder | STEM projects and science demos |
| Topoox 6 Pack DC 1.5-3V Motors | Topoox | DC 0.5-3V, 15000 RPM | Compact mini motors for toy projects | DIY toys and learning experiments |
| EUDAX 18 Set DC Motors Kit | EUDAX | DC 3V, up to 24000 RPM | Mini motors with AA battery holder | STEM kits and classroom use |
| Mudder Micro DC Motors Kit | Mudder | DC 1.5-3V, 23000 RPM | Small, metal construction | DIY projects and experiments |
Note: This overview focuses on second hand or kit motors suitable for projects that require compact size, varied voltages, and easy sourcing. Each product includes a link to the Amazon listing, a product image, and key features to help compare options quickly.
VEVOR 2HP Air Compressor Electric Motor
The VEVOR motor offers a robust 2 HP SPL with a 3450 RPM rating, designed for single-phase operation with 115V or 230V input. Key features include a 56 frame size, 5/8″ keyed shaft, and 1.88″ shaft length with a 0.188″ keyway. It is open drip-proof, suitable for clean and dry environments, and built from high-quality steel for durability and longer service life. This motor is well-matched to air compressors and other stationary equipment requiring reliable starting torque and consistent speed control.
EUDAX 6 Set DC Motors Kit
This kit provides a range of small DC motors suitable for hobby projects and STEM experiments. Operating from 3V to 12V, these motors can reach speeds up to 25,000 RPM with multiple shaft sizes and color variants. The package emphasizes cautions around correct circuit diagrams to avoid short circuits and overheating. It is ideal for rapid prototyping, small robotics, and classroom demonstrations where quick turnarounds and constant velocity testing are valued.
Topoox 6 Pack DC 1.5-3V Motors
These Mini DC motors operate on 0.5-3V with a rated 3V, delivering up to 15,000 RPM. They are compact and easy to install for DIY projects like electric toy cars and science kits. The kit notes simple maintenance like keeping them in sealed bags to prevent dampness and rust, making them a practical option for short-term experiments and educational activities that require small, fast motors.
EUDAX 18 Set DC Motors Kit
This larger EUDAX kit features a paper manual and clear circuit diagrams to help prevent short circuits. It includes motors rated at DC 3V with speeds up to 24,000 RPM and a similar 1.06″ body diameter. Mounting hole spacing is listed at 15mm, with a 10×2.0mm shaft. The package emphasizes practical STEM applications, coding practice, and rapid assembly for classroom or hobbyist projects that require a broad motor assortment.
MELIFE 6 Sets DC Motors Kit
This MELIFE kit packs six DC motors (3V to 12V range) with up to 25,000 RPM no-load speed and 0.39″ x 0.08″ shaft dimensions. It includes a broad assortment of gears and mounting components, making it suitable for more complex assemblies like small robots or geared-drive experiments. Aimed at education and quick prototyping, the set emphasizes durable construction and a comprehensive accessory mix to support longer project lifespans.
Mudder 20 Pieces Micro Motors Kit
The Mudder kit includes 20 micro DC motors, operating from 1.5V to 3V with a 3V rating and speeds up to 23,000 RPM. They are compact, metal-bodied for longer life, and come in silver and black finishes. The kit is designed for student projects, classroom demos, and simple DIY builds where small motors with decent torque are useful for quick experiments and model projects.
BRINGSMART 12V 16rpm Worm Gear Motor
This high-torque gear motor delivers 16 rpm at 12V with a 70 kg.cm rated torque. It uses a worm gear reducer with self-lock capability, making it suitable for projects like door locks, curtain mechanisms, or secure housings where back-driving resistance is needed. Applications extend to bank equipment and safes, where consistent slow motion and torque control are essential. The motor offers a compact solution with robust output in a small footprint.
Buying Guide
Key considerations when selecting second hand or kit motors for DIY and educational uses:
- Voltage and speed: Match motor voltage to your power source and required RPM. Small hobby motors often run on 3V, while larger ones may require 115V or 230V. Consider stall torque and load characteristics for your application.
- Motor type and gearing: Ungeared motors are simple for direct-drive tasks; geared or worm-gear models provide higher torque at low speed and self-locking features for certain applications like locks or positioning.
- Size and mounting: Check shaft diameter, length, and mounting hole spacing. Ensure your design accommodates the frame size (e.g., 56 frame vs. compact mini motors).
- Durability and environment: Open drip-proof designs require clean, dry environments. For educational kits, consider kits with manuals and diagrams to minimize wiring errors and overheating.
- Accessories and compatibility: Kits with battery holders, gears, and propellers simplify prototyping. Verify shaft size compatibility with propellers, gears, or couplers in your project.
- Safety and handling: Use motors within rated voltage ranges and avoid short circuits. Provide proper insulation and secure mounting to prevent movement during operation.
- Reuse and sourcing: Second hand or kit motors can save cost but may require testing for consistent performance. Consider warranty or return options if available.
In summary, the selected motors cover a spectrum from compact DC hobby motors to geared and high-torque variants. When choosing, align your project’s torque, speed, and control needs with the motor’s electrical requirements and mechanical fit to ensure reliable operation and safe usage.